在五十年代进行森林经理调查时,都要编制各龄级森林面积、蓄积量、地位级、疏密度表(简称为大龄级表)。这种资源统计表在编制森林经理施业案中起到很大作用。到六十年代,由于编这种大龄级表比较麻烦,而且我国的森林经营大都比较粗放,不需要这种统计表,所以有一些森林调查设计 When conducting forest managers’ surveys in the 1950s, forest area, stock volume, status grade, and density information table (referred to as the senior age table) of all age groups should be compiled. This resource statistics table in the preparation of the forest manager application case played a significant role. By the 1960s, due to the troublesome compilation of such older age class tables and the fact that most of our country’s forest management operations were extensive, such statistical tables were not needed. Therefore, some forest survey designs